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Proceedings Paper

Dual-layer write-once media for 1x-4x-speed recording based on Blu-ray Disc format
Author(s): Mayumi Uno; Tetsuya Akiyama; Hideki Kitaura; Rie Kojima; Kenichi Nishiuchi; Noboru Yamada
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Paper Abstract

We have developed dual-layer write-once media with Te-O-Pd based recording films on Blu-ray (BD) format. Recording capacity was 50GB with dual layers on a disk of 120mm in diameter. Rear and Front layers showed jitters of 5.8% and 7.7% at 1x speed, and 6.0% and 8.0% at 2x speed, respectively, which were good enough to satisfy the BD format. Evaluations were carried out with blue-violet laser of 405nm wavelength, objective lens NA of 0.85. Recording linear velocities were 4.92m/s at BD 1x (36Mbps), and 9.84m/s at BD 2x (72Mbps). Characteristics at 4x speed recording were also examined, and it was revealed that carrier to niose ratio at high recording linear velocity of 19.7m/s, which corresponds to BD 4x (144Mbps), was alomst as same as those of 1x and 2x. Recording mechanism was discussed and proposed a model that Te-O-Pd films were not crystallized directly through solid process, but crystallized through melting.

Paper Details

Date Published: 16 September 2003
PDF: 8 pages
Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); doi: 10.1117/12.532520
Show Author Affiliations
Mayumi Uno, Matsushita Electric Industrial Co., Ltd. (Japan)
Tetsuya Akiyama, Matsushita Electric Industrial Co., Ltd. (Japan)
Hideki Kitaura, Matsushita Electric Industrial Co., Ltd. (Japan)
Rie Kojima, Matsushita Electric Industrial Co., Ltd. (Japan)
Kenichi Nishiuchi, Matsushita Electric Industrial Co., Ltd. (Japan)
Noboru Yamada, Matsushita Electric Industrial Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 5069:
Optical Data Storage 2003

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